Metallic piston-packing.



No. 775,213. PATENTED NOV. 15, 1904. G. E. ERIGSSON.

METALLIC PISTON PACKING.

APPLICATION FILED JUNE 2,1904.

N0 MODEL.

Patented November 15, 1904.

UNITED STATES PATENT @FFICE.

GUSTAVE E. ERICSSON, OF DUBOlS, PENNSYLVANIA.

METALLIC PISTON-PACKING.

SPECIFICATION forming part of Letters Patent No. 775,213, dated November15, 1904.

Application filed June 2, 1904. Serial No. 210,847. No model.)

To (07/ 1071 0110 it may concern.-

Be it known that I, GUsTAvn E. ERICSSON,

a citizen of the United States, residing at Dubois, county ofClearfield, State of Pennsylvania, have invented certain new and usefulImprovements in Metallic Piston-Packings, of which the following is aspecification.

This invention has relation to metallic piston-packings; and it consistsin the novel construction and arrangement of its parts, as hereinaftershown and described.

The object of the invention is to provide a packing for the pistons ofsteam or gas engines or any form of reciprocating piston.

The further object of the invention is to provide an interrupted ringwhich encircles the piston-head and is adapted to bear against the innersurface of the cylinder. The ring is provided in its outer surface witha plurality of grooves, said grooves extending around the ring and beingclosed at their ends adjacent to the point of interruption in the ring.Each groove is provided with a series of orifices which pass through tothe inner face of the ring, the orifices of the adjacent grooves beingalternately arranged in a transverse direction with relation to eachother. The steam passing through said orifices and entering the groovespractically equalizes the pressure on both sides of the ring, acts as alubricant. and prevents unnecessary wear of both the packing-ring andthe cylinder. The advantage of the alternate arrangement of the orificesis that the ring is not unnecessarily weakened and that the steam mayenter the grooves around the entire outer surface of the ring.

In the accompanying drawings, Figure 1 is a perspective view of thering. Fig. 2 is an edge view of the ring. Fig. 3 is a sectional view ofthe ring cut on the line 3 3 of Fig. 2, and Fig. at is a sectional viewof the ring out on the line at a of Fig. 2.

The ring 1 is interrupted transversely, preferably at an acute angle tothe planes described by the edges of the ring, as shown in Figs. 1 and2. The grooves 3 3 extend around and are located within the outersurface of the ring. the ends of said grooves 3 3 at points adjacent tothe interruption being closed by the pins 4: a. Each groove 3 3 isprovided with a series of orifices 5, which extend transversely throughthe ring. The orifices of the adjacent grooves are alternately arrangedwith relation to each other.

\Vhen the ring or a series of rings are applied to a piston-head, thesteam will pass through the orifices 5 5 and enter the grooves 3 3. Theends of the said grooves being closed by the pins 4 t, the steam cannotescape into the interruption of the ring 2; but the steam containedwithin said grooves in a measure equalizes the pressure on the inner andouter faces of the ring and at the same time acts as a lubricant toreduce the friction between the outer face of the ring and inner-surfaceof the cylinder. I

Having thus described my invention, what 1 claim as new, and desire tosccu re by Letters Patent, is-

1. A packing consisting of an interrupted ring having a groove in itsouter face with orifices extending through the ring and entering saidgroove, said groove having its ends closed adjacent to the point ofinterruption of the ring.

2 A packing consisting of an interrupted ring having in its outer face aplurality of grooves with orifices extending through the ring andentering said grooves, the orifices of the adjacent grooves beingalternately arranged in a transverse direction with relation to eachother, said grooves having their ends closed adjacent to the point ofinterruption of the ring.

3. A packing consisting of a ring having in its outer face a pluralityof grooves with orifices leading through the ring and entering saidgrooves, the orifices of the adjacent grooves being alternately arrangedin a transverse direction with relation to each other.

In testimony whereof I a tfix my signature in the presence of twowitnesses.

GUSTAVE E. ERICSSON.

\Vitnesses:

A. M. TRAIL, W. M. CooHRAN.

